Keep native DateTime, Date and Time struct encoding (#125)

* Keep native DateTime, Date and Time struct encoding

* Add NaiveDateTime

* Add Decimal

* Add tests

lib/logger_json/formatter/redactor_encoder.ex

@@ -32,6 +32,11 @@ defmodule LoggerJSON.Formatter.RedactorEncoder do
   def encode("[REDACTED]", _redactors), do: "[REDACTED]"
   def encode(binary, _redactors) when is_binary(binary), do: encode_binary(binary)
   def encode(%Jason.Fragment{} = fragment, _redactors), do: fragment
+  def encode(%NaiveDateTime{} = naive_datetime, _redactors), do: naive_datetime
+  def encode(%DateTime{} = datetime, _redactors), do: datetime
+  def encode(%Date{} = date, _redactors), do: date
+  def encode(%Time{} = time, _redactors), do: time
+  def encode(%Decimal{} = decimal, _redactors), do: decimal
 
   def encode(%_struct{} = struct, redactors) do
     struct

test/logger_json/formatter/redactor_encoder_test.exs

@@ -35,6 +35,17 @@ defmodule LoggerJSON.Formatter.RedactorEncoderTest do
       assert encode(123, @redactors) == 123
     end
 
+    test "allows dates and times" do
+      assert encode(~U[2024-01-01 00:00:00Z], @redactors) == ~U[2024-01-01 00:00:00Z]
+      assert encode(~N[2024-01-01 00:00:00], @redactors) == ~N[2024-01-01 00:00:00]
+      assert encode(~D[2024-01-01], @redactors) == ~D[2024-01-01]
+      assert encode(~T[00:00:00], @redactors) == ~T[00:00:00]
+    end
+
+    test "allows decimals" do
+      assert encode(Decimal.new("1.2"), @redactors) == Decimal.new("1.2")
+    end
+
     test "strips Structs" do
       assert encode(%IDStruct{id: "hello"}, @redactors) == %{id: "hello"}
     end